diff --git a/_constraints b/_constraints
index 1986d4f..ef3cb50 100644
--- a/_constraints
+++ b/_constraints
@@ -1,4 +1,9 @@
 <?xml version="1.0"?>
 <constraints>
+  <hardware>
+    <disk>
+       <size unit="G">10</size>
+    </disk>
+  </hardware>
   <sandbox>kvm</sandbox>
 </constraints>